85553006778 has 48 divisors (see below), whose sum is σ = 191817568800. Its totient is φ = 27525566880.

The previous prime is 85553006761. The next prime is 85553006779. The reversal of 85553006778 is 87760035558.

85553006778 is a `hidden beast` number, since 85 + 553 + 0 + 0 + 6 + 7 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (85553006779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1735353 + ... + 1783971.

It is an arithmetic number, because the mean of its divisors is an integer number (3996199350).

Almost surely, 2^85553006778 is an apocalyptic number.

85553006778 is an abundant number, since it is smaller than the sum of its proper divisors (106264562022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85553006778 is a wasteful number, since it uses less digits than its factorization.

85553006778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52027 (or 52024 counting only the distinct ones).

The product of its (nonzero) digits is 7056000, while the sum is 54.

The spelling of 85553006778 in words is "eighty-five billion, five hundred fifty-three million, six thousand, seven hundred seventy-eight".